Means for lubricating spring bolts



" NOV. 8',

O ZERK, NOW BY JUDICIAL CHANGE OF NAME 0. U. ZERK MEANS FOR LUBRICATINGSPRING BOLTS Flled March 1921 [UNITED STATE Patented Nov. 8 192 7.

v 1,648,099 PATENT OFFICE.

OSCAB ZERK, NOW BY JUDICIAL CHANGE OF NAME OSCAR ULYSSES ZERK, OI CLEVE-mam, omo, assrenon, mums conramr.

nv' 'MESNE ASSIGNMENTS, ro 'rnn nnssrcx 'HANUFAG- MEANS FOR LUIBBICATINGSPRING BOLTS.

Application fled larch 14, 1921. Serial No. 452,181.

My invention relates to a lubricatingdevice.

One object of my invention is a revision of an automatic ase feedingevlce m which theinlet an "outlet openings and passages are both locatedin front of the piston.

Another object of my invention 18 to provide a ease or oil, cup in whichthe onl threade members which communicate wit the exterior shall besmall in diameter. This is a considerable advantage in a grease or oilcup which is made of drawn steel because of the difliculty and expenseinvolved in accurately cutting threads either exteriorl or; interiorlyon a steel member of large diameter on account ofthe hardness of thesteel.

As further advantages of'my device may be mentioned the PI'OV'lSlOD of agrease-feeding device which shall be'slmp'le in its construction,readily fillable without disassembling, and adapted to-show to theoperator at a glance the amount of lubricant-therein.

Another object is the provision of a means which ma be directly,attached to the end of a spring bolt and in which the spring bolt mayform a portion of the grease retaining.

means. I Refe rin to the drawings in which a device emb yin my inventlonisillustrated,

Fig. 1 is e. si e view of a device in which my invention is embodied;Fig. '2' is a longitudinal section thereof showing a s ring con--nection thereon; Fig. 3 ice side vlew, parts being broken away and insection, showing provided at each end of the transparent member toprovide a tight seal.

In order to hold these members together in position to form a; greasechamber, bolt 23 is rovided, which extends through a nonv circ arcentral opening in the cap 22 and has a similarliyhlfsormednon-cifiulago toil'xtiog 24 e opening. e ea abut: th% dp and serves tohold it in posiacent its threaded end is i communicating with t etransverse opening 27, whereby a communication is provide from thegrease chamber to the interior of the spring bolt 10. I

Slidably mounted upon the bolt 23 is a piston 30 having a washer whichtightly seals against the sides 20 and the bolt 23. This piston may takethe form as illustrated and fully described in my application, SerialNo. 452,130 filed March 14, 1921.

A conical helix spring 31 abuts the cap '22 at one end and the piston atthe other to i create and maintain a pressure within the lubricantcontaining chamber whereb the lubricant is continuously andautomatically fed to the hearing from the lubricant chamher. A vent 25isformed in the cap 22 to allow the escape of air when the piston isforced backward against the action of the spllggg when the ln ricantchamber is being The bolt 10 is provided with the groove 14 and atransverse opening 15 which .ex-

K tends from the groove 14 the longitudinal a slightly difierentarrangement from that of the other opening 13. 7 These openings form acommunicat-ion whereby lubricant may be supplied to the spring shacklefrom the cham- In order, to provide a convenient means for filling thechamber, shown as'extending length of the bolt '10 and the end of thebolt may be interiorl threaded to receive the nipple of'the i at member40. This member includes a check valve 41 adapted to allow the inwardpassage of grease but to prevent its escape. This member is shown theopening 13 is as provided with the dust-cap 42 and the expansion spring43 adapted to retain the dust-ca in position. v

As't e special construction of this device forms no part of the presentinvention, a further detailed description of it is omitted,

throughout the entire co-pending application as any suitable form ofcheck-valve mechterior threads adapted to receive the retainplace inwasher 44 and nut 45 for abutting and ho din in position the shackle. Ifdesired, an or vided in bolt 10 for use with a lock washer to securelyhold the nut and shackle in Iposition. v

have shown in Fig. 2, the bolt in position on a spring. The boltis-provided with the beading and groove 14 and I show in place thereonthe ordinary bronze bushing 50, the end of the automobile spring 51surrounding this bushing. I also show in the spring shackles or toggles52 and 53. prefer to providethe shackle 53 with a flange 54,whi ch isadapted to seat in a slot 55 in the flange 11 of the bolt 10. The flangethen prevents turning of the spring bolt 10 so as to hold the openings15 and the groove 14 in proper relation to the spring.

In Fig.- 3 I have illustrated a slightly different form of spring boltwhich may be emplo ed. This bolt has the outlet opening 15 an the groove14 as in the other case but the longitudinal opening 61 does not extendthroug out the length of the bolt. The end of the bolt is threaded toreceive a suitable holding means such as the castellated nut 56 forholding the spring, the shackles and the bushing In this construction Iemploy the openings 15, both as the outlet opening and theinlet openingthrough which lubricant is forced intothe grease chamber and for thispurpose I form threads in the spring 51'and the bushin 50' and securethe nipple 40 therein; nipple 40 and the other parts of the structuremay be the same as in Fig.

2 and require no further description.

It will be apparent fromv the foregoing description that in both ohtheforms illustrated, grease may be forced into the grease chamber throughthe inlet member 40 by means of a grease gun or the like, and thisgrease will force the piston 30 outward from the position shown in Fig.2.- The lubricant in the a chamber will then be continually forcedoutward from the chamber by the action of the spring 31 to feed thegrease to the spring shackles through the opening 15 and groove 14.

It will, therefore, be apparent that as long as a sufiicient supply ofgrease remains in the chamber to ho d the piston away from the finalposition shown in Fig. 2, the spring 31 will maintain a steady feed oflubricant ina form of slot 46 may be prol-Z that many other devicesembodying the prin- ,a bolt extending throu h said cap to the shackle.It will also be seen that the devices illustrated may be readilysupplied with lubricant without disassembling thereof.

While I have shown the members 10 and .60 as comprising spring bolts, itshould be understood that these members may comprise merely an endmember for a lubricant chamber having an inlet and outlet opening.

While I have described a specific embodiment of my invention, it will beapparent chamber, a cap forming the other end of said chamber, anintermediate member between said ends forming the sideof said chamber, abolt extending through said cap and threaded in said spring bolt to holdsaid parts together, the shank of said bolt having a passage thereinestablishing communication between the interior of said chamber and theinterior of said hollow bolt, and means for creating pressure on thelubricant in said chamber.

2. A device of the class described including, a hollow spring bolthaving a an e at one end forming. an end of a lubricant 0 amber, a capforming the other end of the chamber, an intermediate member betweensaid ends forming the side of said chamber an threaded in said sprin b0t to hold the arts of said chamber toget er, the shank 0 said bolthaving a longitudinal passage therein in communication with said chamberand said hollow bolt.

3. In a device of the class described, two lend members forming the endsof the grease .chamber, said end members having central aperturestherethrough, and a bolt extending through the aperture in one of theend members and threaded into theta erture in the other end member tohold sai members together, said bolt having a longitudinally extenddilngpassage through its threaded end an avmg a transversel extendin assagetherethrough intermediat e said end niiambers and 1n communication withthe longitudinal passage therein.

L The device of the class described, including, two end members formingthe ends of the lubricant chamber, a transparent member between saidends forming the side of said chamber, a bolt threaded in one of saidends and abutting the other end to hold said sage therein extendingthrough its threaded end and in communication with the interior of saidchamber, and means including a piston in said chamber for feedinglubricant therefrom.

5. A device of the class described, including, a spring bolt having aflange at one end, forming one end of a lubricant chamber, a cap formingthe other end of said chamber, an intermediatemember between said endsforming the side of said chamber, a bolt extending through said cap andthreaded in said spring bolt to hold said parts together, the shank ofsaid spring bolt having a passage therein with inlet and outlet 0enings, said passage connecting with said c amber, and means forcreating pressure on the lubricant in said chamber.

6. A device of the class described, including, a hollow bolt having anend member provided with a flange, a rib on said flange, a cap, atransparentqnember seated at one end on said flange within said rib andat its outer end on said cap,- a bolt extending through said cap, thebolt having a shoulder abutting said cap and threaded in said springbolt intermediate the member between said bolt and cap, said membersforming a lubricant chamber, said bolt having a passage through itsthreaded end in communication with the interior of said chamber, meansfor creating pressure upon the grease in said chamber, and means forfilling said chamber with grease.

7. Lubricating means comprising two elements having relative movementand co-operating surfaces to be lubricated; said elements havinglubricant passageways communicating with said surfaces andopeningexternally at different points, external lubri- 8'. In a lubricatingarrangement, a first cylindrical member, a second member encircling saidfirst member and rotatable thereon, said members having contactsurfaces, an oil passage opening at one end of said first cylindricalmember and communicating with the contactingsurfaces of said members, asecond oil passage in said second member and communicating with saidfirst passa e, saidsecond passage also opening external y, externallubricant storage means at one of said openings, resilient means thereinfor feeding lubricant to said contacting surfaces, and an inlet checkvalve at the other 0 enin through which said storage means is a apte tobe filled. V

In testimony whereof, I hereunto aflix my signature.

OSCAR ZERK, Now by Judicial Change of Name Oscar Ulysses Zerk. 7

